Well, here's the mount I made for my Garmin unit. I think it's going to work out OK. I'm taking it on a trip tomorrow for a test run.
I made the bracket which attached to the windshield strap. My windshield comes off (Memphis Shades), so when the shield is off, no fugly mount on the handlebar. The bracket for the Garmin came from GPSCity.com, $16 shipped. It's very secure, much better than the ballmount would have been.
I lucked out on clearing the speedo and it's perfectly angled (also luck on first try). I can change the angle a bit if necessary. I plan to use a set of earphones to hear voice directions and maybe some tunes on long trips. (they worked well with the unit running on batteries in my pocket.
It pops off easily, leaving just the bracket. I am running a 12V power socket out of the headlight. My Garmin 755T came with the "Traffic" power cord which has a big lump of a unit near the end. I might get just a regular power cord which should tuck out of sight. When not in use, the power outlook is out of sight and water-protected. I still have to paint the bracket. If it works out, I might get it powdercoated silver.
And the 12V Power socket, zip-tied to the cable/wire handlebar bracket. Works well, not sure I like it. It will do for now. I used the headlight running light power/ground wires for the socket, as I've never used that light.
